Dovetail



Jan; 5, 1932. w' s-ru'rsoN DOVETAIL Filed March 27, 1931 Y fw/a p;

B W MM ATTORNEYS Fatented Jan. 5, 1932 UNITED STATESI'PAQTENT OFFICEwILLIs STUTSON, or WINNETKA, ILLINOIS DOVETAIL' Application filed March27, 1931. Serial No. 525,799.

struction mounted thereon and "the adjacent portion of the bodyconstruction with the receiving portion mounted thereon;

Fig. 2 is a section on the line 22 of Fig. 1 Fig. 3 is a section on theline 33 of Fig. 1' i is a section onthe line l4l of Fig. 1, and

Fig. 5 is a section on the line 55 of Fig. 1. Referring to the drawingsin detail, the construction shown comprises a receiving member in theform of aconvoluted leaf spring 1 secured inside the door post 2 as byspot-welding or the like, and. a projecting member comprising a sheetmetal stamping 3 and a block 4 of thermo-plasticself-lubricatingwear-resisting material mounted in a,

pocket 5 in the sheet metal member and having upper and lower wearportions 6 prO ecting through corresponding openings in the pocket intoposition to engage the pocket formed in the spring-receiving member 1.In order to facili ate opening the door and easy entrance of theprojecting member, it is made of tapered formation, the spring pocket onthe receiving member being correspondingly tapered, as shown in Figs. 2and 3. The sheet metal pocket member may be provided with upper andlower flanges 7 through which securing screws extend into the door, asshown in Fig. 1. The block of: thermoplastic material may be insertedinto the pocket in the sheet metal member through the space procatingproperties, which avoid the necessity forputting oil on the operatingparts. The receiving spring may be secured to the post by spot-welding,as indicated at 8.

Further modifications will be apparent to those skilled in the art and Idesire, therefore, to be limited only by the prior art and the scope ofthe appended claim.

Having thus described my invention what I claim and desire to secure byLetters Patent A dovetail construction comprising a proectmg member forcooperation with a receivmg member, said projecting member constructioncomprising a block of thermoplastic 'material havinglubricating andwear-resisting properties, a metal housing and holder for said blockcomprising a pocket portion in which the block is seated, and a securingflange portion, said pocket having an opening through which saidblockpro1ects for en gageme'nt with the receiving member.

In witness whereof, I have hereunto subscribed my name.

WILLIS STUTS ON.

vided between the upper and lower flanges, as

may be seen from Fig. 5.

The thermoplastic material used has great wear-resisting qualities andalso self-lubri-

